Since I just did the plenum pan fix and cleaned up the intake I want to keep it clean. Ratmonkey gave me the idea to install a filter in the PCV line going to the manifold to catch any oil in the vapor. I want to do something like this but there is very little room. I don't want to use a small in line fuel filter because it would clog up fast and restrict flow. Has anyone done a set up like this? I'm going down to Lowes or home depot tomorrow to look at their air line filters. I have also contemplated fabbing one of my own like the red water bottle but again, there is not really any room for something this large. Here is also a pic of a very nice one.

This is what I ended up getting at Home Depot. Husky air line filter. I removed the filter as it's not needed. There is a small fan blade inside it that spins and creates a vortex as the air flows through. It was opened up so I got 5 bucks off. Then I got some 3/8 brass fittings for it to run the lines to and from. It's about 6.5" long and I am going to mount it on the back firewall near the pass valve cover. I just need to find or make a bracket. Total cost is around 30 bucks and now My intake will stay clean.

Here it is ghetto rigged temporarily until I can make a bracket. There are a couple of mounting points for a bracket right below using the coolant over flow bottle stud and the cruise control bracket stud. Just going to take some finesse as it's a really tight space. I may build a heat shield for it too. They have smaller Airline filters but I wanted to keep it at 3/8 as to not impede the flow.

yep, that's how it's done.
i end up going through 4 of those 3/8 filters every 6 months between my vehicles.

Thanks for the suggestion. This idea should be a sticky. This is really the only place to mount one this size. I think it will be fine. A small bracket that has an O between the arms would be nice but The more I look at it the lazier I get. I may just get some really thick zip ties and red neck it.

if you pulled the husky sticker off, and once you get it on the firewall, itll be unnoticable.

looks good, and I hope it works good for you.

I got the stickers off and hit it with some high temp black. It just will not fit on the fire wall. It hits the valve cover. With out using a smaller coolant overflow, I don't see how it would fit any place here on the passenger side. The bottom had a cheap plastic valve on it. I but a bolt with some JB weld to seal it permanently.

so the 3/8 ones that people do not like...are those just the 3/8" glass fuel filters like for marine applications? I am lazy enough that I'd go that route now since my ZJ is not driven much...what inline filters were you guys talking about as the alternative? BTW, nice work on this setup and do post the finished bracket.

Other observations:

- you spray painted your rusty A/C accumulator like I did
- you have a cracked top coolant tank mounting hole like I do
- your upper shock bolt is over-torqued and the bushing is pancaked out a little
- your ECU is not covered in that heatshield tape like my OEM one is (CA emis?)
- missing low-side A/C valve cap

The inline fuel filters get filled/clogged up too fast and cause poor flow. I lost the ac cap when I was messing around with too many things at once. I put it somewhere in the garage. It's here but just not visible. Yea, I forgot about the shock bushings. I noticed that a long time ago and just never did anything about it. Don't care much about the coolant tank as long as it's not leaking. I need a new one. I'll get one from the junk yard once it cools off more.

They make a smaller version of the one I got that would fit better. You could get fittings with a 3/8 outlet.

Agreed on that this should be tossed in the FAQ. I like the idea of this and if it'll keep oil out of the plenum then why the hell not?

It won't if the plenum gasket is bad, but you are right that it will keep oil out of the intake that gets sucked through the vapor into the intake. I noticed a little oil around the PCV nipple and at first though I screwed up the plenum install. But when I looked closer, it was only around that area and you could see that mark it made dripping down. I cleaned it up best I could. PCV sucks. Supposed to be better for the environment but it's bad for the motor.